create a nim wrapper for cloudflare quiche

[diegomrsantos]

quiche is an implementation of the QUIC transport protocol and HTTP/3 as specified by the IETF. It provides a low level API for processing QUIC packets and handling connection state. The application is responsible for providing I/O (e.g. sockets handling) as well as an event loop with support for timers.

What should be done:

• A new repo created
• A new wrapper for https://github.com/cloudflare/quiche/blob/master/quiche/include/quiche.h is created
• Basic CI for supported OS and architectures is created
• Basic tests that prove the wrapper is working as expected

[diegomrsantos]

We are going to finish #725 for now.